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        <h1 class="page_title">chrome.history</h1>
        
        
        
        <div id="toc">
          <h2>Contents</h2>
          <ol>
            <li>
              <a href=#manifest>Manifest</a>
            </li>
            <li>
              <a href=#transition_types>Transition types</a>
            </li>
            <li>
              <a href=#examples>Examples</a>
            </li>
            <li>
              <a href="#apiReference">API reference: chrome.history</a>
              <ol>
                  <li><a href="#types">Types</a><ol>  <li>    <a href="#type-HistoryItem">HistoryItem</a>  </li>  <li>    <a href="#type-VisitItem">VisitItem</a>  </li></ol></li>
                  
                  <li><a href="#methods">Methods</a><ol>  <li><a href="#method-search">search</a></li>  <li><a href="#method-getVisits">getVisits</a></li>  <li><a href="#method-addUrl">addUrl</a></li>  <li><a href="#method-deleteUrl">deleteUrl</a></li>  <li><a href="#method-deleteRange">deleteRange</a></li>  <li><a href="#method-deleteAll">deleteAll</a></li></ol></li>
                  <li><a href="#events">Events</a><ol>  <li><a href="#event-onVisited">onVisited</a></li>  <li><a href="#event-onVisitRemoved">onVisitRemoved</a></li></ol></li>
                  <li><a href="#samples">Sample Extensions</a></li>
              </ol>
            </li>
          </ol>
        </div>

<p id="classSummary">
Use the <code>chrome.history</code> module to interact with the 
browser's record of visited pages.  You can add, remove, and query
for URLs in the browser's history.
To override the history page with your own version, see 
<a href="override.html">Override Pages</a>.
</p>

<h2 id="manifest">Manifest</h2>

<p>You must declare the "history" permission
in the <a href="manifest.html">extension manifest</a>
to use the history API.
For example:</p>
<pre>{
  "name": "My extension",
  ...
  <b>"permissions": [
    "history"
  ]</b>,
  ...
}</pre>

<h2 id="transition_types">Transition types</h2>

<p>
The history API uses a <em>transition type</em> to describe
how the browser navigated to a particular URL
on a particular visit.
For example, if a user visits a page
by clicking a link on another page,
the transition type is "link".
</p>

<p>
The following table describes each transition type.
</p>

<table>
<tr>
  <th> Transition type </th> <th> Description </th>
</tr>
<tr id="tt_link">
  <td>"link"</td>
  <td>
    The user got to this page by clicking a link on another page.
  </td>
</tr>
<tr id="tt_typed">
  <td>"typed"</td>
  <td>
    The user got this page by typing the URL in the address bar.
    Also used for other explicit navigation actions.
    See also <a href="#tt_generated">generated</a>,
    which is used for cases where the user selected a choice
    that didn't look at all like a URL.
  </td>
</tr>
<tr id="tt_auto_bookmark">
  <td>"auto_bookmark"</td>
  <td>
    The user got to this page through a suggestion in the UI &mdash;
    for example, through a menu item.
  </td>
</tr>
<tr id="tt_auto_subframe">
  <td>"auto_subframe"</td>
  <td>
    Subframe navigation.
    This is any content that is automatically
    loaded in a non-top-level frame.
    For example, if a page consists of
    several frames containing ads,
    those ad URLs have this transition type.
    The user may not even realize the content in these pages
    is a separate frame, and so may not care about the URL
    (see also <a href="#tt_manual_subframe">manual_subframe</a>).
  </td>
</tr>
<tr id="tt_manual_subframe">
  <td>"manual_subframe"</td>
  <td>
    For subframe navigations that are explicitly requested by the user
    and generate new navigation entries in the back/forward list.
    An explicitly requested frame is probably more important than
    an automatically loaded frame
    because the user probably cares about the fact that
    the requested frame was loaded.
  </td>
</tr>
<tr id="tt_generated">
  <td>"generated"</td>
  <td>
    The user got to this page by typing in the address bar
    and selecting an entry that did not look like a URL.
    For example, a match might have the URL of a Google search result page,
    but it might appear to the user as "Search Google for ...".
    These are not quite the same as <a href="#tt_typed">typed</a> navigations
    because the user didn't type or see the destination URL.
    See also <a href="#tt_keyword">keyword</a>.
  </td>
</tr>
<tr id="tt_start_page">
  <td>"start_page"</td>
  <td>
    The page was specified in the command line or is the start page.
  </td>
</tr>
<tr id="tt_form_submit">
  <td>"form_submit"</td>
  <td>
    The user filled out values in a form and submitted it.
    Note that in some situations &mdash;
    such as when a form uses script to submit contents &mdash;
    submitting a form does not result in this transition type.
  </td>
</tr>
<tr id="tt_reload">
  <td>"reload"</td>
  <td>
    The user reloaded the page,
    either by clicking the reload button
    or by pressing Enter in the address bar.
    Session restore and Reopen closed tab use this transition type, too.
  </td>
</tr>
<tr id="tt_keyword">
  <td>"keyword"</td>
  <td>
    The URL was generated from a replaceable keyword
    other than the default search provider.
    See also
    <a href="#tt_keyword_generated">keyword_generated</a>.
  </td>
</tr>
<tr id="tt_keyword_generated">
  <td>"keyword_generated"</td>
  <td>
    Corresponds to a visit generated for a keyword.
    See also <a href="#tt_keyword">keyword</a>.
  </td>
</tr>
</table>

<h2 id="examples">Examples</h2>

<p>
For examples of using this API, see the
<a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/history/">history sample directory</a> and the
<a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/test/data/extensions/api_test/history/">history API test directory</a>.
For other examples and for help in viewing the source code, see
<a href="samples.html">Samples</a>.
</p>
        <h2 id="apiReference">API Reference: chrome.history</h2>
        <div class="api_reference">
            <h3 id="types">Types</h3>
              <div>
                <h3 id="type-HistoryItem">HistoryItem</h3>
                <div>
                  <dt><span class="type_name">  (    <span id="typeTemplate">object</span>  )</span></dt>
              <dd>
                    An object encapsulating one result of a history query.
                  </dd>    <h4 id="HistoryItem-properties">
                    Properties of <a href="#type-HistoryItem">HistoryItem</a>
                  </h4>
                  <dd><dl>      <div>
                      <a name="property-HistoryItem-id"></a>
                      <dt>
                        <span class="variable">id</span>
                        <span class="property">
                          (
                            
                            <span id="typeTemplate">string</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The unique identifier for the item.
                      </dd>
                    </div>
                    <div>
                      <a name="property-HistoryItem-url"></a>
                      <dt>
                        <span class="variable">url</span>
                        <span class="property">
                          (
                            <span class="optional">optional</span>
                            <span id="typeTemplate">string</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The URL navigated to by a user.
                      </dd>
                    </div>
                    <div>
                      <a name="property-HistoryItem-title"></a>
                      <dt>
                        <span class="variable">title</span>
                        <span class="property">
                          (
                            <span class="optional">optional</span>
                            <span id="typeTemplate">string</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The title of the page when it was last loaded.
                      </dd>
                    </div>
                    <div>
                      <a name="property-HistoryItem-lastVisitTime"></a>
                      <dt>
                        <span class="variable">lastVisitTime</span>
                        <span class="property">
                          (
                            <span class="optional">optional</span>
                            <span id="typeTemplate">double</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        When this page was last loaded, represented in milliseconds since the epoch.
                      </dd>
                    </div>
                    <div>
                      <a name="property-HistoryItem-visitCount"></a>
                      <dt>
                        <span class="variable">visitCount</span>
                        <span class="property">
                          (
                            <span class="optional">optional</span>
                            <span id="typeTemplate">integer</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The number of times the user has navigated to this page.
                      </dd>
                    </div>
                    <div>
                      <a name="property-HistoryItem-typedCount"></a>
                      <dt>
                        <span class="variable">typedCount</span>
                        <span class="property">
                          (
                            <span class="optional">optional</span>
                            <span id="typeTemplate">integer</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The number of times the user has navigated to this page by typing in the address.
                      </dd>
                    </div>
              </dl></dd>
                </div>
              </div>
              <div>
                <h3 id="type-VisitItem">VisitItem</h3>
                <div>
                  <dt><span class="type_name">  (    <span id="typeTemplate">object</span>  )</span></dt>
              <dd>
                    An object encapsulating one visit to a URL.
                  </dd>    <h4 id="VisitItem-properties">
                    Properties of <a href="#type-VisitItem">VisitItem</a>
                  </h4>
                  <dd><dl>      <div>
                      <a name="property-VisitItem-id"></a>
                      <dt>
                        <span class="variable">id</span>
                        <span class="property">
                          (
                            
                            <span id="typeTemplate">string</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The unique identifier for the item.
                      </dd>
                    </div>
                    <div>
                      <a name="property-VisitItem-visitId"></a>
                      <dt>
                        <span class="variable">visitId</span>
                        <span class="property">
                          (
                            
                            <span id="typeTemplate">string</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The unique identifier for this visit.
                      </dd>
                    </div>
                    <div>
                      <a name="property-VisitItem-visitTime"></a>
                      <dt>
                        <span class="variable">visitTime</span>
                        <span class="property">
                          (
                            <span class="optional">optional</span>
                            <span id="typeTemplate">double</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        When this visit occurred, represented in milliseconds since the epoch.
                      </dd>
                    </div>
                    <div>
                      <a name="property-VisitItem-referringVisitId"></a>
                      <dt>
                        <span class="variable">referringVisitId</span>
                        <span class="property">
                          (
                            
                            <span id="typeTemplate">string</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The visit ID of the referrer.
                      </dd>
                    </div>
                    <div>
                      <a name="property-VisitItem-transition"></a>
                      <dt>
                        <span class="variable">transition</span>
                        <span class="property">
                          (
                            
                            <span id="typeTemplate">enumerated string ["link", "typed", "auto_bookmark", "auto_subframe", "manual_subframe", "generated", "auto_toplevel", "form_submit", "reload", "keyword", "keyword_generated"]</span>
                          )
                        </span>
                      </dt>
                      <dd>
                        The <a href='#transition_types'>transition type</a> for this visit from its referrer.
                      </dd>
                    </div>
              </dl></dd>
                </div>
              </div>
            <h3 id="methods">Methods</h3>
              <div>
                <h4 id="method-search">search</h4>
                <div class="summary lower">
                  <span>chrome.history.search</span>(<span>object <span class="variable">query</span></span>)
                </div>
                <div class="description">
              <p>
                    Searches the history for the last visit time of each page matching the query.
                  </p>    <h4>Parameters</h4>
                  <dl>
                    <div>  <a name="property-search-query"></a>  <dt>    <span class="variable">query</span>    <span class="property">      (                <span id="typeTemplate">object</span>      )    </span>  </dt>  <dd>    <dl>      <div>        <a name="property-query-text"></a>        <dt>          <span class="variable">text</span>          <span class="property">            (                            <span id="typeTemplate">string</span>            )          </span>        </dt>        <dd>          A free-text query to the history service.  Leave empty to retrieve all pages.        </dd>      </div>      <div>        <a name="property-query-startTime"></a>        <dt>          <span class="variable">startTime</span>          <span class="property">            (              <span class="optional">optional</span>              <span id="typeTemplate">double</span>            )          </span>        </dt>        <dd>          Limit results to those visited after this date, represented in milliseconds since the epoch.        </dd>      </div>      <div>        <a name="property-query-endTime"></a>        <dt>          <span class="variable">endTime</span>          <span class="property">            (              <span class="optional">optional</span>              <span id="typeTemplate">double</span>            )          </span>        </dt>        <dd>          Limit results to those visited before this date, represented in milliseconds since the epoch.        </dd>      </div>      <div>        <a name="property-query-maxResults"></a>        <dt>          <span class="variable">maxResults</span>          <span class="property">            (              <span class="optional">optional</span>              <span id="typeTemplate">integer</span>            )          </span>        </dt>        <dd>          The maximum number of results to retrieve.  Defaults to 100.        </dd>      </div>    </dl>  </dd></div>
                  </dl>
                  <h4>Callback function</h4><p>      The <em>callback</em> parameter should specify a function      that looks like this:</p><pre>function(array of <a href="history.html#type-HistoryItem">HistoryItem</a> results) <span class="subdued">{...}</span>;</pre><dl>  <div>  <a name="property-callback-results"></a>  <dt>    <span class="variable">results</span>    <span class="property">      (                <span id="typeTemplate">array of <a href="history.html#type-HistoryItem">HistoryItem</a></span>      )    </span>  </dt></div></dl>
                </div>
              </div>
              <div>
                <h4 id="method-getVisits">getVisits</h4>
                <div class="summary lower">
                  <span>chrome.history.getVisits</span>(<span>object <span class="variable">details</span></span>)
                </div>
                <div class="description">
              <p>
                    Retrieves information about visits to a URL.
                  </p>    <h4>Parameters</h4>
                  <dl>
                    <div>  <a name="property-getVisits-details"></a>  <dt>    <span class="variable">details</span>    <span class="property">      (                <span id="typeTemplate">object</span>      )    </span>  </dt>  <dd>    <dl>      <div>        <a name="property-details-url"></a>        <dt>          <span class="variable">url</span>          <span class="property">            (                            <span id="typeTemplate">string</span>            )          </span>        </dt>        <dd>          The URL for which to retrieve visit information.  It must be in the format as returned from a call to history.search.        </dd>      </div>    </dl>  </dd></div>
                  </dl>
                  <h4>Callback function</h4><p>      The <em>callback</em> parameter should specify a function      that looks like this:</p><pre>function(array of <a href="history.html#type-VisitItem">VisitItem</a> results) <span class="subdued">{...}</span>;</pre><dl>  <div>  <a name="property-callback-results"></a>  <dt>    <span class="variable">results</span>    <span class="property">      (                <span id="typeTemplate">array of <a href="history.html#type-VisitItem">VisitItem</a></span>      )    </span>  </dt></div></dl>
                </div>
              </div>
              <div>
                <h4 id="method-addUrl">addUrl</h4>
                <div class="summary lower">
                  <span>chrome.history.addUrl</span>(<span>object <span class="variable">details</span></span>)
                </div>
                <div class="description">
              <p>
                    Adds a URL to the history at the current time with a <a href='#transition_types'>transition type</a> of "link".
                  </p>    <h4>Parameters</h4>
                  <dl>
                    <div>  <a name="property-addUrl-details"></a>  <dt>    <span class="variable">details</span>    <span class="property">      (                <span id="typeTemplate">object</span>      )    </span>  </dt>  <dd>    <dl>      <div>        <a name="property-details-url"></a>        <dt>          <span class="variable">url</span>          <span class="property">            (                            <span id="typeTemplate">string</span>            )          </span>        </dt>        <dd>          The URL to add.        </dd>      </div>    </dl>  </dd></div>
                  </dl>
                  <h4>Callback function</h4><p>      If you specify the <em>callback</em> parameter, it should      specify a function that looks like this:</p><pre>function() <span class="subdued">{...}</span>;</pre><dl>  </dl>
                </div>
              </div>
              <div>
                <h4 id="method-deleteUrl">deleteUrl</h4>
                <div class="summary lower">
                  <span>chrome.history.deleteUrl</span>(<span>object <span class="variable">details</span></span>)
                </div>
                <div class="description">
              <p>
                    Removes all occurrences of the given URL from the history.
                  </p>    <h4>Parameters</h4>
                  <dl>
                    <div>  <a name="property-deleteUrl-details"></a>  <dt>    <span class="variable">details</span>    <span class="property">      (                <span id="typeTemplate">object</span>      )    </span>  </dt>  <dd>    <dl>      <div>        <a name="property-details-url"></a>        <dt>          <span class="variable">url</span>          <span class="property">            (                            <span id="typeTemplate">string</span>            )          </span>        </dt>        <dd>          The URL to remove.        </dd>      </div>    </dl>  </dd></div>
                  </dl>
                  <h4>Callback function</h4><p>      If you specify the <em>callback</em> parameter, it should      specify a function that looks like this:</p><pre>function() <span class="subdued">{...}</span>;</pre><dl>  </dl>
                </div>
              </div>
              <div>
                <h4 id="method-deleteRange">deleteRange</h4>
                <div class="summary lower">
                  <span>chrome.history.deleteRange</span>(<span>object <span class="variable">range</span></span>)
                </div>
                <div class="description">
              <p>
                    Removes all items within the specified date range from the history.  Pages will not be removed from the history unless all visits fall within the range.
                  </p>    <h4>Parameters</h4>
                  <dl>
                    <div>  <a name="property-deleteRange-range"></a>  <dt>    <span class="variable">range</span>    <span class="property">      (                <span id="typeTemplate">object</span>      )    </span>  </dt>  <dd>    <dl>      <div>        <a name="property-range-startTime"></a>        <dt>          <span class="variable">startTime</span>          <span class="property">            (                            <span id="typeTemplate">double</span>            )          </span>        </dt>        <dd>          Items added to history after this date, represented in milliseconds since the epoch.        </dd>      </div>      <div>        <a name="property-range-endTime"></a>        <dt>          <span class="variable">endTime</span>          <span class="property">            (                            <span id="typeTemplate">double</span>            )          </span>        </dt>        <dd>          Items added to history before this date, represented in milliseconds since the epoch.        </dd>      </div>    </dl>  </dd></div>
                  </dl>
                  <h4>Callback function</h4><p>      The <em>callback</em> parameter should specify a function      that looks like this:</p><pre>function() <span class="subdued">{...}</span>;</pre><dl>  </dl>
                </div>
              </div>
              <div>
                <h4 id="method-deleteAll">deleteAll</h4>
                <div class="summary lower">
                  <span>chrome.history.deleteAll</span>()
                </div>
                <div class="description">
              <p>
                    Deletes all items from the history.
                  </p>  </div>
              </div>
            <h3 id="events">Events</h3>
              <div>
                <h4 id="event-onVisited">onVisited</h4>
                <div class="summary">
                  <span class="subdued">chrome.history.</span>onVisited<span class="subdued">.addListener</span>(function(<span><a href="history.html#type-HistoryItem">HistoryItem</a> <span class="variable">result</span></span>)<span class="subdued"> {...}</span>);
                </div>
                <div class="description">
              <p>
                    Fired when a URL is visited, providing the HistoryItem data for that URL.  This event fires before the page has loaded.
                  </p>      <h4>Listener Parameters</h4>
                    <dl>
                      <div>  <a name="property-onVisited-result"></a>  <dt>    <span class="variable">result</span>    <span class="property">      (                <span id="typeTemplate"><a href="history.html#type-HistoryItem">HistoryItem</a></span>      )    </span>  </dt></div>
                    </dl>
                </div>
              </div>
              <div>
                <h4 id="event-onVisitRemoved">onVisitRemoved</h4>
                <div class="summary">
                  <span class="subdued">chrome.history.</span>onVisitRemoved<span class="subdued">.addListener</span>(function(<span>object <span class="variable">removed</span></span>)<span class="subdued"> {...}</span>);
                </div>
                <div class="description">
              <p>
                    Fired when one or more URLs are removed from the history service.  When all visits have been removed the URL is purged from history.
                  </p>      <h4>Listener Parameters</h4>
                    <dl>
                      <div>  <a name="property-onVisitRemoved-removed"></a>  <dt>    <span class="variable">removed</span>    <span class="property">      (                <span id="typeTemplate">object</span>      )    </span>  </dt>  <dd>    <dl>      <div>        <a name="property-removed-allHistory"></a>        <dt>          <span class="variable">allHistory</span>          <span class="property">            (                            <span id="typeTemplate">boolean</span>            )          </span>        </dt>        <dd>          True if all history was removed.  If true, then urls will be empty.        </dd>      </div>      <div>        <a name="property-removed-urls"></a>        <dt>          <span class="variable">urls</span>          <span class="property">            (              <span class="optional">optional</span>              <span id="typeTemplate">array of string</span>            )          </span>        </dt>      </div>    </dl>  </dd></div>
                    </dl>
                </div>
              </div>
        </div>
          <h2 id="samples">Sample Extensions that use chrome.history</h2>
            <li><strong><a href="samples.html#27840ea197cf9d783a89661d934c60b1">Typed URL History</a></strong> &ndash;
            Reads your history, and shows the top ten pages you go to by typing the URL.
        </li>
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